Patents Examined by Mark Nagumo
-
Patent number: 5756587Abstract: Propylene block copolymer containing per:100 parts by weight of a polymer (a) of propylene chosen from homopolymers and copolymers of propylene not containing more than 6% by weight of ethylene and/or of an alpha-olefin having from 4 to 6 carbon atoms,from 1 to 100 parts by weight of a polymer (b) of ethylene chosen from homopolymers and copolymers of ethylene not containing more than 90% by weight of propylene and/or of another alpha-olefin having from 4 to 6 carbon atoms,the said block copolymer additionally containing from approximately 0.001 to approximately 20% by weight of .alpha.,.omega.-diene-derived monomer units with respect to the total weight of the block copolymer.Type: GrantFiled: September 12, 1996Date of Patent: May 26, 1998Assignee: Solvay Polyolefins Europe -- Belgium (Societe AnonymeInventors: Serge Bettonville, Philippe De Rop, Claude Franquinet
-
Patent number: 5756417Abstract: Catalyst compositions for the oligomerization or polymerization of olefinically unsaturated hydrocarbons, comprising a heterocyclopentadienyl of the general formulaC.sub.4 AR.sub.4,wherein A is a Group V element and each R, which is connected to a carbon of the heterocyclopentadienyl ring, can be the same or different and is chosen from hydrogen or an organic substituent (optionally containing one or more heteroatoms), in complex with a Group IV or V metal, and the process of oligomerization or polymerization olefinically unsaturated hydrocarbons in the presence of such catalyst compositions.Type: GrantFiled: January 31, 1997Date of Patent: May 26, 1998Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Eric Johannes Maria De Boer, Henricus Jacobus Robert De Boer, Hero Jan Heeres
-
Patent number: 5756582Abstract: A process for producing a silane-crosslinked polyolefin which is characterized by melt-blending (i) a polyolefinic base polymer, (ii) a carrier polymer A containing an organic unsaturated silane and a free radical generating agent and containing substantially no water and (iii) a carrier polymer B containing a silanol condensation catalyst and an antioxidant, at a temperature higher than the crystal melting point of the base polymer to effect reaction, and then contacting the resulting reaction product with water to effect crosslinking. The process can provide a silane-crosslinked polyolefin excellent in extrusion processability as well as in crosslinking property, mechanical property and heat resistance.Type: GrantFiled: January 30, 1997Date of Patent: May 26, 1998Assignee: Sumitomo Bakelite Company LimitedInventor: Tsuneharu Mori
-
Patent number: 5756608Abstract: A process for polymerizing C.sub.2 -C.sub.10 -alk-1-enes in the presence of a metallocene complex of the formula I ##STR1## where the substituent groups have the meanings described in the specification.Type: GrantFiled: July 12, 1996Date of Patent: May 26, 1998Assignee: BASF AktiengesellschaftInventors: Franz Langhauser, David Fischer, Jurgen Kerth, Gunther Schweier, Hans-Herbert Brintzinger, Elke Barsties, Werner Roell
-
Patent number: 5753255Abstract: There is provided a chewable medicinal tableting composition comprising as proportions of the total composition which will further comprise the medicinally active component, as first essential component: capric triglyceride: about 30 to about 95% by weight, and as second essential component: the medicinally active ingredient: up to 60% by weight. Where the medicinally active ingrdient is less than about 30% by weight the composition further comprises as third essential component, a member of the group consisting of glyceryl monostearate, a mixture of glyceryl monostearate and glyceryl monopalmitate, and a mixture comprising at least about 40-50% by weight of glyceryl monostearate, and glyceryl distearate: up to 10% by weight. There are also disclosed methods of making these compositions.Type: GrantFiled: February 11, 1997Date of Patent: May 19, 1998Inventors: Leonard Chavkin, Leonard Mackles
-
Patent number: 5753773Abstract: Multiphase block copolymers of propylene comprisinga) a polymer of propylene with from 0 to 5% by weight of further C.sub.2 -C.sub.10 1-alkenes,b) a copolymer of propylene with from 5 to 98% by weight of further C.sub.2 -C.sub.10 1-alkenes,the multiphase block copolymers having a melting point of less than 155.degree. C. and a stiffness (shear modulus G) conforming to the following condition (I): ##EQU1## where M.sub.a) denotes the amount of propylene polymer a) and M.sub.co denotes the amount of the multiphase block copolymer.are obtainable in particular by polymerization by means of metallocene-containing catalyst systems.Type: GrantFiled: November 9, 1995Date of Patent: May 19, 1998Assignee: BASF AktiengesellschaftInventors: Franz Langhauser, Juergen Kerth, Patrik Mueller, Meinolf Kersting, Guenther Schweier
-
Patent number: 5750213Abstract: A polymerizable compound represented by Formula (I): ##STR1## where X is a hydrogen atom or a methyl group; l and m are independently an integer of 0 to 14; Y is a single bond, --COO--, --OCO--, or --O--; n and p are independently an integer of 0 to 18; q and s are independently an integer of 0 or 1; and R.sup.A and R.sup.B are independently represented by Formula (II) or (III); ##STR2## provided that, when q=1, p.gtoreq.2; and when R.sup.A is represented by the Formula (II), R.sup.B is represented by the Formula (II).Type: GrantFiled: February 25, 1997Date of Patent: May 12, 1998Assignees: Sharp Kabushiki Kaisha, Kanto Kagaku Kabushiki KaishaInventors: Noriaki Onishi, Nobuaki Yamada, Masahiko Yoshida, Hoyo Mizobe, Kenji Suzuki
-
Patent number: 5750615Abstract: This invention relates to curable rubber compositions containing a fullerene form of carbon which is used as a reinforcing agent in the rubber compositions, the fullerene form of carbon being used in place of at least a portion of, or in addition to, the normally used forms of carbon black reinforcement additives. The invention particularly relates to tires having treads composed of such rubber composition(s). The fullerenes may optionally have surface modifications such as partial or complete hydrogen or functional group substitution. The fullerene form of non-conventional carbon reinforcement of rubber composition(s) may exist as discrete particles, aggregates of particles and/or agglomerates. The carbon fullerene has a lower specific gravity than conventional carbon black, thereby allowing a reduced weight tire or other article made from the rubber compound(s) for comparable volumes of carbon black used.Type: GrantFiled: November 26, 1996Date of Patent: May 12, 1998Assignee: The Goodyear Tire & Rubber CompanyInventors: Lewis Timothy Lukich, Thomas Edwin Duncan, Colleen Marie Lansinger
-
Patent number: 5750815Abstract: Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained cyclic and acyclic olefins. Specifically, the present invention relates to carbene compounds of the formula ##STR1## wherein: M is Os or Ru; R and R.sup.1 are independently selected from hydrogen and functional groups C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.2 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl or C.sub.1 -C.sub.20 alkylsulfinyl; each optionally substituted with C.sub.1 -C.sub.5 alkyl, a halogen, C.sub.1 -C.sub.5 alkoxy or with a phenyl group optionally substituted with a halogen, C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxy; X and X.sup.Type: GrantFiled: August 29, 1996Date of Patent: May 12, 1998Assignee: California Institute of TechnologyInventors: Robert H. Grubbs, SonBinh T. Nguyen
-
Patent number: 5747405Abstract: Catalyst compositions comprising both metallocene complexes having polymerisable groups and polymerization catalysts eg Ziegler-Natta may be used for the preparation of polyolefins. The catalyst compositions may comprise the metallocene complex in the form of a polymer and may suitably be supported on inorganic supports. Polymers having a wide range of molecular weights and comonomer distributions may be prepared by use of the catalyst compositions. Preferred metallocene complexes are zirconium complexes in which the polymerisable group is vinyl.Type: GrantFiled: May 2, 1996Date of Patent: May 5, 1998Assignee: BP Chemicals LimitedInventors: Ian Raymond Little, John Paul McNally
-
Patent number: 5741620Abstract: Reactive polymeric dyes are provided comprising a chromophoric moiety derived from at least one free radically polymerizable dye and an azlactone moiety derived from 2-alkenylazlactone such that the free radically polymerizable dye is incorporated into the backbone of the polymer. Alternatively, 2-alkenylazlactone is polymerized and then derivatized with a nucleophilic dye or dyes, such that the chromophoric potion of the dye is pendent to the polymer backbone. Both types of reactive polymeric dyes may also contain additional polymerized monomeric units. The reactive polymeric dyes of the present invention can be used in a photoresist system and in particular in a color proofing construction.Type: GrantFiled: January 16, 1996Date of Patent: April 21, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Gary L. Holmes, Terrance P. Smith, Mahfuza B. Ali, David W. Macomber
-
Patent number: 5739178Abstract: A polymeric material incorporating a polyvalent cation chelating agent in an amount effective to inhibit the growth of an ocular pathogen, particularly a protozoan, can be used to produce eye care products such as contact lens cases and containers for containing eye care solutions and contact lenses.Type: GrantFiled: May 15, 1995Date of Patent: April 14, 1998Assignee: AllerganInventors: Charles Hayes Powell, David C. Rupp
-
Patent number: 5733834Abstract: The organic carrier supported metallocene catalyst of the present invention is prepared by preparing a ligand complex of a silicone compound having at least one halogen, an alkyl group and a cycloalkane dienyl group, activating styrene polymer or styrene/divinylbenzene copolymer with a strong base including a metal atom such as Li, Na, K or Mg, reacting the activated polymer or copolymer with the ligand complex of a silicone compound so that the ligand may be supported on the activated polymer or copolymer, and reacting the organic carrier supported ligand with a compound of a transition metal of Group IVb of the Periodic Table or Lanthanides of Atomic Number 58-71. The styrene polymer or styrene/divinylbenzene copolymer may be alkylated by Friedel-Crafts alkylation before they are activated with a strong base.Type: GrantFiled: December 17, 1996Date of Patent: March 31, 1998Assignee: Samsung General Chemicals Co., Ltd.Inventors: Gazuo Soga, Hyun-joon Kim, Sang-kyun Lee, Min-chul Jung, Byung-hee Son, Wuozmi Thosiya, Irai Thakhasi, Nishida Hiroro
-
Patent number: 5733989Abstract: The present invention concerns prepolymerized catalyst composition for polymerization of .alpha.-olefins, a process for the preparation thereof and a process for polymerization of .alpha.-olefins. According to the polymerization process a procatalyst composition containing a transition metal is prepolymerized with a monomer in order to produce a prepolymerized Ziegler-Natta type catalyst composition and said catalyst composition is contacted with an alpha-olefin monomer, in particular with ethylene or propylene, for preparing a polymer. According to the invention the procatalyst composition is preferably prepolymerized in a medium which is inert to the catalyst components, the viscosity of the medium being so high that the catalyst does not substantially settle in this medium. Because the catalyst composition according to the invention does not have to be dried before being fed into the medium, its activity is high before and during polymerization.Type: GrantFiled: March 27, 1997Date of Patent: March 31, 1998Assignee: Borealis A/SInventors: Ismo Pentti, Pauli Leskinen
-
Patent number: 5733979Abstract: Catalytic solids based on titanium trichloride complex, usable for the stereospecific polymerisation of alpha-olefins, obtained by heat treatment, in the presence of a halogenated activating agent, of the liquid material resulting from bringing TiCl.sub.4, pretreated with an electron-donor compound, into contact with a composition (C) corresponding to the general formulaAlR.sub.p (Y).sub.q X.sub.3-(p+q)in whichR represents a hydrocarbon radical or a hydrogen atom;Y represents a group chosen from --OR', --SR' and --NR'R", in which R' and R" each represent a hydrocarbon radical or a hydrogen atom;X represents a halogen;p is an arbitrary number such that 0<p<3; andq is an arbitrary number such that 0<q<3;the sum (p+q) being such that 0<(p+q).ltoreq.3.These catalytic solids of controllable porosity permit the production of a wide range of propylene polymers, in particular the propylene and ethylene copolymers known as "block" copolymers.Type: GrantFiled: February 18, 1993Date of Patent: March 31, 1998Assignee: Solvay (Societe Anonyme)Inventors: Jean-Louis Costa, Sabine Pamart
-
Patent number: 5731387Abstract: An ionically-crosslinked absorbent graft copolymer which exhibits pressure sensitive adhesive properties is provided comprised of a hydrophilic and/or hydrophobic base monomer and a water-soluble or water-dispersible macromer. The ionically-crosslinked absorbent graft copolymer exhibits desirable water absorbency and water vapor transmission rates and may be used in a variety of medical applications such as a wound dressing, medical adhesive, or biomedical electrode.Type: GrantFiled: March 7, 1996Date of Patent: March 24, 1998Assignee: Adhesives Research, Inc.Inventor: Michael J. Zajaczkowski
-
Patent number: 5728793Abstract: Disclosed is a process for producing a methacrylate polymer, wherein a monomer feed composed of methyl methacrylate or a mixture of at least 70 weight % of methyl methacrylate and not more than 30 weight % of one or more vinyl monomers copolymerizable with methyl methacrylate is continuously bulk polymerized in a substantially perfect mixing state to give a polymer composition having a polymer content of 40-70% by weight in a continuous manner, which comprises carrying out the bulk polymerization in the reactor which is filled up with the polymer composition leaving substantially no gas phase therein and which is maintained in a thermally insulated state allowing substantially no exchange of heat with the external environment at a polymerization temperature of 120.degree.-180.degree. C.Type: GrantFiled: October 10, 1995Date of Patent: March 17, 1998Assignee: Sumitomo Chemical Company, LimitedInventors: Takashi Kumagai, Masahiko Moritani, Toyomitsu Shimizu, Satoshi Shimogama
-
Patent number: 5728917Abstract: Disclosed are ruthenium and osmium carbene compounds which are stable in the presence of a variety of functional groups and which can be used to catalyze olefin metathesis reactions on unstrained cyclic and acyclic olefins. Specifically, the present invention relates to carbene compounds of the formula ##STR1## wherein: M is Os or Ru; R and R.sup.1 are independently selected from hydrogen and functional groups C.sub.2 -C.sub.20 alkenyl, C.sub.2 -C.sub.20 alkynyl, C.sub.1 -C.sub.20 alkyl, aryl, C.sub.1 -C.sub.20 carboxylate, C.sub.2 -C.sub.20 alkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.2 -C.sub.20 alkynyloxy, aryloxy, C.sub.2 -C.sub.20 alkoxycarbonyl, C.sub.1 -C.sub.20 alkylthio, C.sub.1 -C.sub.20 alkylsulfonyl or C.sub.1 -C.sub.20 alkylsulfinyl; each optionally substituted with C.sub.1 -C.sub.5 alkyl, a halogen, C.sub.1 -C.sub.5 alkoxy or with a phenyl group optionally substituted with a halogen, C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxy; X and X.sup.Type: GrantFiled: October 30, 1995Date of Patent: March 17, 1998Assignee: California Institute of TechnologyInventors: Robert H. Grubbs, SonBinh T. Nguyen
-
Patent number: 5728641Abstract: According to the present invention there are provided a catalyst component, a catalyst using the catalyst component and a process using the catalyst, for the preparation of olefin polymers high in molecular weight and relatively wide in molecular weight distribution, using an extremely small amount of a modified organoaluminum compound such as methylaluminoxane and in high yield. The catalyst component is prepared by contacting at least the following constituents (1), (2), (3) and (4) with one another:(1) a compound represented by the general formula Me.sup.1 R.sup.1.sub.p (OR.sup.2).sub.q X.sub.4-p-q where R.sup.1 and R.sup.2 are each independently a hydrocarbon group having 1 to 24 carbon atoms, X is a halogen atom, Me is Zr, Ti or Hf, p and q are each an integer in the ranges of 0.ltoreq.p.ltoreq.4 and 0.ltoreq.q.ltoreq.4, provided 0.ltoreq.p+q.ltoreq.4;(2) at least one compound selected from the group consisting of compounds represented by the following general formulas 1 to 4:General formula 1: Me.sup.Type: GrantFiled: June 21, 1995Date of Patent: March 17, 1998Assignee: Nippon Oil Company, LimitedInventors: Fuyuki Aida, Yoshio Tajima, Kazuo Matsuura
-
Patent number: 5728911Abstract: A copolymer having an RSV less than 0.6 and a process for its preparation in which ethylene, at least one other 1-alkene and, optionally, an aliphatic or alicyclic polyunsaturated monomer are polymerized in the presence of a catalyst system containing (1) a compound of vanadium, (2) at least one alkyl aluminum halide, (3) an .alpha.-halo, ketoaromatic promoter and (4) a chain transfer agent in which the molar ratio of alkyl groups of the alkyl aluminum halide to halogen atoms is at least 1.5.Type: GrantFiled: November 27, 1995Date of Patent: March 17, 1998Assignee: DSM Copolymer, Inc.Inventor: James R. Hall